Draw works



I lay/bakk I 4ATTORNEYS IN VEN TOR Patented Nov. 11, 1924.

HARRY C. BREWSTER, 0F SHREVEPORT, LOUISIANA.

DRAW wonrcs.V

Application filed October 13, 1923. Serial No. 668,316.

To 7J/whom Il may concern.'

Be it known that I', HARRY C. Bnnws'rnn, a citizen of the United States, and resident of Shreveport, in the parish of Caddo and State of Louisiana, have invented certain new and useful improvements `in Draw Vorks, of which the following is a specilication. y y K This invention :relates to draw works, especially adapted for use in connection with the rotary system of drilling.

In the draw works now generally in use, three main supports are provided for the drive shaft and because of the normal position of the drum the placing of a supporting post at the intermediate portion of the drive shaft isimpossible, and therefore the intermediate portion of the drive shaft is frequently sprung. v

Therefore an important aim of this invention is to soorganize` the draw works that the intermediate portion of the drive shaft is effectively braced whereby it will `not be sprung during use and will` operate with a minimum of vibration and wear.

A further object is to provide a draw works wherein the Same is provided with a novel form of foundation or base so that it may be securely and' positively held in position. y y

A further object is to provide a draw works which is of highly simplified construction, durable in use and cheap to manufacture. f

Other objects and advantages will be apparent during the course of the following description. y

The `accompanying drawings forming `a pant of this application, and in which like numerals are employed to designate like parts throughout the same,

-Figure 1 is a side 'elevation of the improved draw works,

Figure 2 is an end elevation of the draw works.

In the drawings, wherein for the purpose of illustration, is shown a preferred embodiment of the invention, the numerals 5, 6, and 7 designate the main and original posts of the machine, and the numeral 8 designates the additional post which is so located that it is` in line with the original posts 5, 6, and 7 so that it will effectively support and brace the drive shaft 10. In carrying out the invention, the drive shaft 10 is extended through bearings 11 carried by posts 5, 6, and 7 and 8, and of course the bearings are all in line. Figure 1 illustrates that the main drive sprocket 12'which is keyed to the intermediate portion of the main drive shaft 10 is located close to the intermediate post 8 so thatthe strain incident to thev drive through the wheel will not spring the shaft. In the machine as now built, the drum 14 prevents the employment of the additional intermediate post'8 because the drum intersects the plane in which the posts 5, 6, and 7 are located. However, in accordance with this invention, the drum is not supported by the posts 5, 6, and 7, butis supported by inclined braces 16 and 17 the said' braces being connected at the upper ends by bolts 1,8 to the posts 5, 6, and 7. The lower portion of the inclined bracing members 16y and 17 are connected to the upstanding branches 2O of metal brackets 22, the said brackets being extended across and secured to sills 24. One end yof each bracket 22 is extended upwardly' to provide an attaching portion'26 which Vis secured by bolts or other suitable `means to the posts 5, 6 and 7. Due to the employment of the parallel sills 24, a wide base or foundation is provided by means of which an extremely rigid and durable construction is provided. The parallel sills 24 not only provide an extremely durable and rigid construction, but also rconstitute a supporting means for` the inclined braces 16 and 17. i

Attention is especially directed to the fact that the membersV 16 and 17 serve the dual purpose of bracing the end posts 5, 6 and 7 and of supporting the drum 14. This dual function performed by the inclined braces 16 and 17 makes possible the employment'of tatably support the drum`14 substantially in advance of the plane in which the main drive shaft 10 is located and this allows the posts 5, 6, and 7 and 8 to all be in the same plane.

In sum1nariZing,-it might be said that the inclined posts serve the following distinct purposes, all of which contribute to making the draw work much more rigid, durable and ecient than heretofore:

1.v As a supporting means for the drum 14.

2. As a brace for the posts 5, 6 and 7.

3. As a means to space the drum 14 subthe intermediate brace 8. More specifically, Vthe inclined bracing members'l and 17 rostantially in advance of the plane in which the posts 5 6,'and 7 are located,"thns making it possible to have the posts '5, 6, and 7 and8 all in the same plane.

4. Asa means of distributing Weight and strain over a larger foundation.

The usual power transmitting gears Q8, 30, 31, and 32 may be lemployed Without interference from the additional post S or the inclined. bracing and sup-porting mem,-

'llers 1.6 and 17. `Aalso the'speed change mechanism may also be employed in the usual manner Without `being interfered with in anyl Way.

O'f course, the drilling rotary has connections byfmeans of the usual sprocket chains Witlithe geared).V l With reference to the foregoing descriptiontakenin vconnection With thev accompanying dran/'ing it vvillbeseen that a draw Works constructed in accordance with this j invention Will' effectively support the main v rangement and construction of parts may bel made as Will remain Within the spirit of the invention and the scope of 'What is n Havingv thus described the invention, what is claimed iszy l. `A draw Works for rotary Well drilling comprising a'plurality of spaced posts [all arranged approximately in the same plane, a drive shaft rotatably carried by said posts, a drive member mounted Ion said shaft adjacent one ofsaid posts,a drum located immediately in advance of one of saidv posts, andv a plurality of combined posts bracing and drum supporting members connected to certain of said posts and spacing said drum substantially in advance of the intermediate` ypost and brackets supporting said combined post bracings and drum supporting members and connecting the same to said posts.

2. A draw Works for rota-ry well drilling comprising a plurality of spaced posts all arranged in approximatelyl the saine plane, a drive shaft rotatably carried by said posts, a drive member mounted on said sha-ft adjacent one of said posts, a drum located in advance of one of said posts, a

` plurality of combined post bracing and drum supporting members connected to certain of said posts and spacing said drum substantially in advance of the intermediate posts, supporting brackets connected to certain of said posts and supporting said combined post' bracing and drum supporting members and a plurality of spaced parallel sills connected to said brackets and defining a Wide supporting foundation.

`3. rllhe combination with a plurality of main posts, of an additional bracing post arranged between said main posts and in the plane of tlie same, inclined bracing members connected to the main posts, a drum supported solely by said bracing members and arranged substantiallyV in advance of the additional post, a main drive shaft rotatably carried by said main and additional post and having a drive member located 'adjacent said' additional post, and brackets projecting from said main posts and supporting said bracing and drum supporting members.

4. The combination With a plurality of main posts, of an additional vbracing post arranged between saidmain posts and in the plane of the same inclined bracing members connected to the main posts, a drum supported solely by said bracing members and arranged substantially in advance of the additional post a main drive shaft rotatably carried by said main and additional posts and having a drive member located adjacent said additional post, and brackets projecting from said main posts and supporting said bracing and drum supporting members, and sills connected to said brackets and defining a Wide supporting HARRY o. BREWSTER.

foundation. 

